"""
Given an array nums. We define a running sum of an array as runningSum[i] = sum(nums[0]…nums[i]).

Return the running sum of nums.



Example 1:

Input: nums = [1,2,3,4]
Output: [1,3,6,10]
Explanation: Running sum is obtained as follows: [1, 1+2, 1+2+3, 1+2+3+4].
Example 2:

Input: nums = [1,1,1,1,1]
Output: [1,2,3,4,5]
Explanation: Running sum is obtained as follows: [1, 1+1, 1+1+1, 1+1+1+1, 1+1+1+1+1].
Example 3:

Input: nums = [3,1,2,10,1]
Output: [3,4,6,16,17]


Constraints:

1 <= nums.length <= 1000
-10^6 <= nums[i] <= 10^6
"""


class Solution:
    def runningSum(self, nums):
        """
        running sum
        :param nums: the numbers list
        :type nums list[int]
        :return: list[int]
        """

        for i in range(len(nums)):
            if i != 0:
                nums[i] += nums[i-1]

        return nums
